Quiz 1

Which of the following is considered as GNSS?

• GPS, GLONASS, Inmarsat

• Galileo, Thuraya, Beidou, QZSS

• NAVIC, GPS, GLONASS

The global GNSS market size as reported by European Space Agency in 2019 is

• Trillions

• Billions

• Millions

The advantages of extra satellites are:

• Improved continuity

• Improved accuracy

• All of the above

The GPS L1 carrier frequency and wavelength are:

• 1575.42 MHz, 19.03 cm

• 1227.60 MHz, 24.42 cm

• 1176.45 MHz, 25.48 cm

Survey and geodetic type receivers cannot measure the code measurement:

• True

• False

The navigation-type receiver heavily dependent on the carrier phase measurement:

• True

• False

The O-File in RINEX format contain information about:

• Satellite ephemeris

• Schedule of the satellite

• Code and carrier phase measurement

The carrier phase is considered as an ambiguous measurement due to:

• Unknown coordinate

• Unknown carrier phase ambiguity

• Unknown range from satellite to receiver

The N-File in RINEX format contain information about:

• Orbit information

• Geometry of the satellite

• Geometry of the orbit

GPS for surveying usually solve for:

• The time

• The baseline vector

• The coordinate of the receiver